Replace ASSERT, ASSERT_NOT_REACHED, and RELEASE_ASSERT in core/css/

third_party/WebKit/Source/core/css/CSSViewportRule.cpp

 /*
  * Copyright (C) 2012 Intel Corporation. All rights reserved.
  * Copyright (C) 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above
  *    copyright notice, this list of conditions and the following
@@ skipping 49 matching lines @@
   result.append(decls);
   if (!decls.isEmpty())
     result.append(' ');
 
   result.append('}');
 
   return result.toString();
 }
 
 void CSSViewportRule::reattach(StyleRuleBase* rule) {
-  ASSERT(rule);
+  DCHECK(rule);
   m_viewportRule = toStyleRuleViewport(rule);
   if (m_propertiesCSSOMWrapper)
     m_propertiesCSSOMWrapper->reattach(m_viewportRule->mutableProperties());
 }
 
 DEFINE_TRACE(CSSViewportRule) {
   visitor->trace(m_viewportRule);
   visitor->trace(m_propertiesCSSOMWrapper);
   CSSRule::trace(visitor);
 }
 
 }  // namespace blink